Scientists find a new way of entangling light and sound https://phys.org/news/2024-11-scientists-entangling.html
"Scientists at the Max-Planck-Institute for the Science of Light (MPL) have now demonstrated a particularly efficient way in which photons can be entangled with acoustic phonons."
-Max Planck Institute for the Science of Light
Ah, I see! It sounds like you're referring to **stimulated Brillouin scattering (SBS)**, which involves the interaction between photons (light) and phonons (sound waves) in a waveguide.
In this process:
- A **pump wave** (a laser beam) and a **probe wave** (another laser beam) interact within the waveguide.
- The pump wave generates acoustic waves (phonons) through electrostriction.
- These phonons then interact with the probe wave, causing a frequency shift and generating a new wave called the **Brillouin wave**.
This nonlinear interaction can be used for various applications, such as optical signal processing, sensing, and even creating optical memories.
Does this help clarify things? If you have more questions or need further details, feel free to ask!
A **Stokes photon** is a photon that is emitted with lower energy (and thus longer wavelength) than the photon that was originally absorbed by a material[43dcd9a7-70db-4a1f-b0ae-981daa162054](https://405nm.com/stokes-and-anti-stokes-emissions/?citationMarker=43dcd9a7-70db-4a1f-b0ae-981daa162054 "1"). This phenomenon is known as the **Stokes shift** and occurs because some of the absorbed energy is lost to vibrational relaxation or other processes before the photon is emitted[43dcd9a7-70db-4a1f-b0ae-981daa162054](https://en.wikipedia.org/wiki/Stokes_shift?citationMarker=43dcd9a7-70db-4a1f-b0ae-981daa162054 "2").
Would you like to know more about how this is used in applications like spectroscopy?
-CoPilot
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